Photographic-roll holder



My 2o, 1924a 1,494,719

A. STUBER ET AL.

PHOTGGRAPHIC ROLL HOLDER Fle Obi. 20, 1923 Patented May 20, 1924.

f entrantv i I PATENT OFFC' ADOLPH STUBEB. AND ERNEST :e rUisnnnwoon,yor ROCHESTER, rNEW Yloitm'as-` SIGNoRsTO EASTMAN KODAK ooinrenr. orYnoCiauis'ritn, NEW Yoann Couronn- TION F NEW YORK.

PHOTOGitArHIC-ROLL lnonnina.'

application med lomber 2o, 1923.A serial No'. s693421# To allwhomz'tmay/concern.: i

Be it known that we, ADoLrI-I STUBER and ERNEST E. UNDERWOOD, bothcitizens ofthe United States7 residing.' at Rochester, in the county ofAMonroe and' State of New York,

have invented certain new and useful Improvements in Photographic-.RollHolders; and'we do hereby declare the following to be a full, clear, andexact description of the same, reference ,being had to the accompanyingdrawings,r forming a part of this specification, and to the referencenumerals marked thereon. s l v` Y e Our present linvention relates tophotography and more particularly to photographic cameras and torollholders therefor and it has for its objectto provide a simple andconvenient but inexpensive means for holding a film roll under tensionwhile in a roll holder. The improvements are directed in part producinga device that will work with certainty and uniformity while the ilm rollis decreasing in diameter or whatever its size. To these and other endsthe invention resides in certain improvements and combinations of partsall as will be hereinafter more fully described the novel features beingpointed out in the claims at the endk of the specification.

In the drawings:

Figure 1 is a side view of a roll holder constructed in accordance withand illustrating one embodiment of our invention.

Figure 2 is a section on the line 2--2 of Figure 1.

Figure 3 is a longitudinal central sectional view through a camerafitted with the roll holder.

Figure 4 is a fragmentary top view of one of the film chambers in theroll holder and Figure 5 is a perspective view of a fragment of one ofthe film tensioning devices.

Similar reference numerals throughout the several views indicate thesame parts.

The camera that we have illustrated in the present instance is a boxcamera comprising a body 1 having a lens opening 2 at the front and adetachable back 3. In rear of the lens opening is a lens 4 mounted on ablock 5 on a partition plate 6 having an openin 7 in alignment with thelens.

e roll holder consists in the present instance of an all metal framework that may be inserted and removed through the back 3.

It embodies a front'plate'S having an opening 9 cooperating'with thelopening "7 and side plates l0 fitting the interior of thev cam'- eralbox qute'closely. Between the side plates 10- are relatively transversetop'V and 'bottom plates 11 that converge toward the front of the.camera narrowing down to a'degree-of separation little greaterthan thediameter of the opening 9. `At the-reantheyforrnan exposure opening 12past'which affilin 13 is guided in the focalfplanein the usual vmanner.'Y

The convergence of the'v interior plates 11 forms, on opposite'sidesOfthe roll-holder,

chambers 14 that progressively increase"`- in depth a forwarddirectionytheside and frontwalls thereof being constituted by the walls8 and 10. When the roll holder is in place in the camera, the outerwalls of the chamber are conStitutedb-y the walls of the body so thatthe chambers are completely enclosed but become accessible upon with-`drawing the roll holder from the camera. Transverse rollers 15 extendingacross the chambers 14 are so spaced from the front walls 8 that thesetwo elements are adapted to closely conline between .them the filmspools 16 from one to the other of which the lilm 13 is wound in theordinary manner. The rollers 15 are placed above the centers of thespools so that as the winding strain is placed upon them they will keepto the bottoms of the 'film chambers and not show a tendency to rideout.

In the practice of our invention we provide a tensioning device for theilm rollsto prevent them from overthrowing. These are usually so madethat they bear upon the lilm roll itself and as the roll decreases insize their effect is progressively lessened.

.With our improvements the pressure Vis transferred from the roll to thespool itself after the diameter of the roll has decreased a little andthus an even tension is maintained after the roll has become diminished.To these ends we fasten to each yfront wall .los

At the center of each a rounded abutment strap 20 of reentrant curvatureis struck out.

loo' l 8 of the film chambers a spring plate 17, inV s v The flanges 21of the spools ride against the arms 19 on the outer sides of theseabutment straps so that endwise thrust of the spools is prevented Yandpositive centering devices are not required as shown in Figure 4, Whenthe spool is fullor the roll thereon is of maximum diameter, the strapsbear directly but after the first fevv convolutions have been turned offthe arms 19 bear directly against the edges of thev spool flanges asshown in Figure 4C and the spring con tinues to operate Without losingany ofl its effectiveness through foulingthe receding surface oftheroll. Y

An. advantage of havingv the tensioning device preliminarilyv engage theroll directly is found in loading-the camera and threading. the film asthe straps 20 hold the convolutions down tight Whilev t-he lead end isbeing manipulated.

` The side Walls 10 of the film chambers at the ends of the spools arecut away at- 22 to give finger room during the insertion or removal ofthe spools Which are merely dropped in infront of the rollers 15 Whilethe springs yield.

We claim as our invention:

1, In a photographic roll holder, the combination with a film chamberhaving means for rotatably supporting a flanged film spool, of a springtensioning device having a portion adapted to engage the film rolldirectly and a portion adapted to engage a flange of the spool on whichsuch film is Wound.

2. In a photographic roll holder, the com binati'on with a film chamberhaving means for rotatably supporting a fianged 'film spool, of aspring'tensioning device adapted to frictionally engage the flanges of aspool in the holder and having abutments thereon cooperating ywith theflanges to prevent endWise movement of the spool.

3.l In a photographic roll holder, the oombination with a film chamberhaving means for rotatably supporting a lflanged film spool, of alspring tensioning, device embodying transverse arms` adapted: tofrictionally engage the fianges of a spool in the chamber and-providedwith projecting portions adapted to bear on the film When fully Woundupon the spool and to also cooperate withI the spool flanges; to.preventy endwise movement thereof.V

' `ADOLPHl S'TUBER.

ERNEST E. UNDERWOOD.

